Mercurial > hg > graal-jvmci-8
diff src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/gc_implementation/parallelScavenge/adjoiningVirtualSpaces.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,69 @@ +/* + * Copyright 2003-2005 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +# include "incls/_precompiled.incl" +# include "incls/_adjoiningVirtualSpaces.cpp.incl" + +AdjoiningVirtualSpaces::AdjoiningVirtualSpaces(ReservedSpace rs, + size_t min_low_byte_size, + size_t min_high_byte_size, + size_t alignment) : + _reserved_space(rs), _min_low_byte_size(min_low_byte_size), + _min_high_byte_size(min_high_byte_size), _low(0), _high(0), + _alignment(alignment) {} + +// The maximum byte sizes are for the initial layout of the +// virtual spaces and are not the limit on the maximum bytes sizes. +void AdjoiningVirtualSpaces::initialize(size_t max_low_byte_size, + size_t init_low_byte_size, + size_t init_high_byte_size) { + + // The reserved spaces for the two parts of the virtual space. + ReservedSpace old_rs = _reserved_space.first_part(max_low_byte_size); + ReservedSpace young_rs = _reserved_space.last_part(max_low_byte_size); + + _low = new PSVirtualSpace(old_rs, alignment()); + if (!_low->expand_by(init_low_byte_size)) { + vm_exit_during_initialization("Could not reserve enough space for " + "object heap"); + } + + _high = new PSVirtualSpaceHighToLow(young_rs, alignment()); + if (!_high->expand_by(init_high_byte_size)) { + vm_exit_during_initialization("Could not reserve enough space for " + "object heap"); + } +} + +bool AdjoiningVirtualSpaces::adjust_boundary_up(size_t change_in_bytes) { + assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); + size_t actual_change = low()->expand_into(high(), change_in_bytes); + return actual_change != 0; +} + +bool AdjoiningVirtualSpaces::adjust_boundary_down(size_t change_in_bytes) { + assert(UseAdaptiveSizePolicy && UseAdaptiveGCBoundary, "runtime check"); + size_t actual_change = high()->expand_into(low(), change_in_bytes); + return actual_change != 0; +}